Service manual

Agilent 85309A H40, H41, H42 Operating and Service Manual Modification
5
Revised Operations
All rear panel functional descriptions are the same for the HIGH or LOW
band operations.
J15 Rear Panel Port, HIGH/LOW BAND SELECT
When the front panel BAND SELECT switch is set to EXT, this port can be
used to select the operating band desired by the following TTL levels:
HIGH BAND: > + 4 Vdc
LOW BAND: < 0.5 Vdc
J7 and J8 (using nondiplexed mixers)
These two rear panel ports are not available on the Agilent Technologies
85309A H40, H41, and H42 options.